Spoilers Ahead:

Story: 6
Natsuo Ishida is a super talented girl who pissed off too many people because of her talent. Her brother, friends, and etc. She then gets destroyed by an annoying bitch, Yuzuko Mawatari, from a fight on the roof and then strives to defeat her in the future in a tournament. Problems in the story are sometimes really evident. Some of the action don't have anything to it rather than Natsuo being "talented" except for her last loss that was complete bullshit. The main goal for the mc is just to fight the annoying girl that is Mawatari. Then there is the problems with characters like her brother and Sawamura and Ringi. The main plot isn't boring concept, but it was executed poorly. It had poor buildup, lack of good fights, and it ended way too early. The story is above average and would like to see the continuation, but want to see improvements if the author comes back.

Art:8
The art was done well for the most part. Some character designs were a little weird, but you can still appreciate the designs still.

Character: 6
Some of the characters were actually lovable and others were just plain bad.
The loveble;
-Natsou, even though had a shit personality, was enjoyable character to love. She was like Sawamura from HnI and had some cool story along with her.
-Sawamura, Ninomiya, and Ganeko are also likeable characters.
Ishidou the brother, even though he abused his sister, has seen error in his ways and seem to get him self back on track near the end of the series.
The Garbage:
-Yuzuko is the worst character in Teppuu. I mean the end just proves this as she defeated Natsou even though Natsou is as talented as Takamura from HnI. Seriously this is like Wally vs Ippo except of being logical to some extent(Wally had little experience since he barely started but was talented) instead we get this bullshit that she defeats her with willpower alone. I mean Ippo at least had talent but worked hard too. That being said, I liked that she worked hard to at least get there, but it was clear she should've lost. She also doesn't have any character development other than, she likes to get hit.
-Mario is also some bullshit too. No fighter can have 500 or whatever opponents they have defeated with no losses.(Also that is even impossible as time between fights would have to be like a week or two.) Even greats fall but apparently not. He also has a huge ego for being a person who didn't even fight a man who is supposedly weak.
-Ringi because she is just there to be there.

Enjoyment and Overall:7
The series is good to read and would recommend. It suffers from stuff here and then but overall a 7.